Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 29 (1922) > Annual Issue
Document Type
Research
Abstract
These geodes occur in Lime Creek shales. They are rather unusual in containing a number of roundish cavities rather than the customary rough opening. The cavities are lined with: 1. small rhombic calcite crystals which are bronzed with limonite; 2. occasional tabular and fan-shaped aggregates of barite crystals. The mode of formation is obscure.
Publication Date
1922
Journal Title
Proceedings of the Iowa Academy of Science
Volume
29
Issue
1
First Page
128
Last Page
129
Copyright
©1922 Iowa Academy of Science, Inc.
Language
en
File Format
application/pdf
Recommended Citation
Galpin, S. L.
(1922)
"The Rockford Geodes,"
Proceedings of the Iowa Academy of Science, 29(1), 128-129.
Available at:
https://scholarworks.uni.edu/pias/vol29/iss1/25